1/*-
2 * Copyright (c) 2005 Takanori Watanabe
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
|
28__FBSDID("$FreeBSD: head/sys/geom/label/g_label_ntfs.c 154513 2006-01-18 11:03:20Z pjd $");
|
| 28__FBSDID("$FreeBSD: head/sys/geom/label/g_label_ntfs.c 199875 2009-11-28 11:57:43Z trasz $"); |
29
30#include <sys/param.h>
31#include <sys/systm.h>
32#include <sys/kernel.h>
33#include <sys/malloc.h>
34
35#include <fs/ntfs/ntfs.h>
36
37#include <geom/geom.h>
38#include <geom/label/g_label.h>
39
40#define G_LABEL_NTFS_DIR "ntfs"
41
42
43static void
44g_label_ntfs_taste(struct g_consumer *cp, char *label, size_t size)
45{
46 struct g_provider *pp;
47 struct bootfile *bf;
48 struct filerec *fr;
49 struct attr *atr;
50 off_t voloff;
51 char *filerecp, *ap;
52 char mftrecsz, vnchar;
53 int recsize, j;
54
55 g_topology_assert_not();
56
57 label[0] = '\0';
58 pp = cp->provider;
59 filerecp = NULL;
60
61 bf = (struct bootfile *)g_read_data(cp, 0, pp->sectorsize, NULL);
62 if (bf == NULL || strncmp(bf->bf_sysid, "NTFS ", 8) != 0)
63 goto done;
64
65 mftrecsz = (char)bf->bf_mftrecsz;
66 recsize = (mftrecsz > 0) ? (mftrecsz * bf->bf_bps * bf->bf_spc) : (1 << -mftrecsz);
67 if (recsize % pp->sectorsize != 0)
68 goto done;
69
70 voloff = bf->bf_mftcn * bf->bf_spc * bf->bf_bps +
71 recsize * NTFS_VOLUMEINO;
72 if (voloff % pp->sectorsize != 0)
73 goto done;
74
75 filerecp = g_read_data(cp, voloff, recsize, NULL);
76 if (filerecp == NULL)
77 goto done;
78 fr = (struct filerec *)filerecp;
79
80 if (fr->fr_fixup.fh_magic != NTFS_FILEMAGIC)
81 goto done;
82
83 for (ap = filerecp + fr->fr_attroff;
84 atr = (struct attr *)ap, atr->a_hdr.a_type != -1;
85 ap += atr->a_hdr.reclen) {
86 if (atr->a_hdr.a_type == NTFS_A_VOLUMENAME) {
87 if(atr->a_r.a_datalen >= size *2){
88 label[0] = 0;
89 goto done;
90 }
91 /*
92 *UNICODE to ASCII.
93 * Should we need to use iconv(9)?
94 */
95 for (j = 0; j < atr->a_r.a_datalen; j++) {
96 vnchar = *(ap + atr->a_r.a_dataoff + j);
97 if (j & 1) {
98 if (vnchar) {
99 label[0] = 0;
100 goto done;
101 }
102 } else {
103 label[j / 2] = vnchar;
104 }
105 }
106 label[j / 2] = 0;
107 break;
108 }
109 }
110done:
111 if (bf != NULL)
112 g_free(bf);
113 if (filerecp != NULL)
114 g_free(filerecp);
115}
116
|
117const struct g_label_desc g_label_ntfs = {
|
| 117struct g_label_desc g_label_ntfs = { |
118 .ld_taste = g_label_ntfs_taste,
|
119 .ld_dir = G_LABEL_NTFS_DIR
|
119 .ld_dir = G_LABEL_NTFS_DIR,
120 .ld_enabled = 1 |
121};
|
122
123G_LABEL_INIT(ntfs, g_label_ntfs, "Create device nodes for NTFS volumes"); |
|